基于共焦辐射和光学层析技术重建火焰温度场  

Temperature Field Reconstruction Based on Confocal Radiation and Optical Sectioning Tomography

作　　者：刘兆宇 刘石[2] 张耀方 Liu Zhaoyu;Liu Shi;Zhang Yaofang(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]华北电力大学控制与计算机工程学院,北京102206

出　　处：《燃烧科学与技术》2024年第3期229-238,共10页Journal of Combustion Science and Technology

摘　　要：针对实际测量中设备观察口有限、对于特定位置或受背景辐射影响较大位置的温度测量问题,设计了一种共焦辐射微孔相机,将共焦技术与光学层析技术相结合,利用格林函数的双调和算子插值算法重建全场火焰温度.首先,介绍了共焦辐射微孔相机测温的基本原理,对该相机的聚焦位置及聚焦系数进行了实验标定,并用黑体炉标定了共焦辐射微孔相机的测量信号与火焰辐射强度之间的关系;最后通过层析算法和格林函数双调和插值算法对火焰温度场进行重建.结果表明:共焦辐射微孔相机测量重建结果与燃烧温度场的分布趋势大致相同,重建误差不高于10%,具有较好的灵活性和良好的抗噪性.Aiming at the problem of limited observation ports,specific locations and locations that are greatly affected by background,a confocal radiation microporous camera is designed.The flame temperature is reconstructed using optical sectioning tomography and the bimodal sum operator interpolation algorithm of the Green's function.Firstly,the basic principle of temperature measurement by confocal radiation microporous camera was introduced.The focusing position and focusing coefficient of the camera were experimentally calibrated.The relationship between the measurement signal of the confocal radiation microporous camera and the intensity of the flame radiation was calibrated with a blackbody furnace.Finally,the flame temperature field was reconstructed by the optical sectioning tomography and the bimodal sum operator interpolation algorithm of the Green's function.The results show that the reconstruction results of the confocal radiation microporous camera are roughly consistent with the distribution trend of the combustion temperature field,and the reconstruction error is less than 10%.It has good flexibility and noise immunity.

关 键 词：共焦辐射微孔相机 光学层析算法 温度场重建 传感器标定 插值算法 

分 类 号：TK311[动力工程及工程热物理—热能工程]